Hello to you!
I agree with you that it is difficult to represent an object that we have not seen, and therefore, it is susceptible to subjectivity, although I would not say for that reason that the object of knowledge is subjective per se.
That is, today I may find someone beautiful, and tomorrow I may change my mind, however, that does not change the beauty that person may or may not have.
Thanks for stopping by and for sharing!
Cheers!